tree f51c5cf9d99f311ac082e06b00dc94a8b1532007
parent 6870b1293261942c99a15f5e150c7b99bf32b45b
author James E. Blair <jeblair@redhat.com> 1466110953 -0700
committer James E. Blair <jeblair@redhat.com> 1466110953 -0700

Ansible launcher: delay node assignment under load

Gearman wakes all available workers at the same time when a job
is available.  The first one to respond gets the job.  To attempt
to more evenly distribute nodes (which are assigned via a gearman
job) across multiple zuul launchers, delay for a period
related exponentially to the number of nodes this launcher currently
has between the wake up and grab job packets.

Change-Id: I307938f97b730b229c1622cd2f929fc5b65ccdad